debug(web): add logging to changePasswordAction to diagnose Verbindungsfehler

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/lib/auth-actions.ts

@@ -106,7 +106,10 @@ export async function changePasswordAction(
   const cookieStore = await cookies();
   const session = cookieStore.get('session')?.value;
 
+  console.log('[changePasswordAction] session present:', !!session, 'API_URL:', API_URL);
+
   if (!session) {
+    console.error('[changePasswordAction] no session cookie found');
     return { success: false, error: 'networkError' };
   }
 
@@ -120,8 +123,11 @@ export async function changePasswordAction(
       body: JSON.stringify({ currentPassword, newPassword }),
     });
 
+    console.log('[changePasswordAction] API response status:', response.status);
+
     if (!response.ok) {
       const data = await response.json().catch(() => null);
+      console.error('[changePasswordAction] API error:', data);
       if (data?.message === 'Current password is incorrect') {
         return { success: false, error: 'wrongCurrentPassword' };
       }
@@ -129,7 +135,8 @@ export async function changePasswordAction(
     }
 
     return { success: true };
-  } catch {
+  } catch (err) {
+    console.error('[changePasswordAction] fetch threw:', err);
     return { success: false, error: 'networkError' };
   }
 }